Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
van thanh » ban thanh, van tuan
su triet » su viet, su tien, ve triet
cac lop » cac hop, cac loai
sach ky » sac ky, sach y, sach kem
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cac lo » cac co, cac bo, cac ho
van su » dan su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) OR (sach ty)) nang xa hoi. hieu ve ((cac lo) or (cac lop)) van thanh van su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) nang xa hoi. hieu ve ((cac lo) OR (cac lop)) van thanh van su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach ty)) nang xa hoi. hieu ve ((cac lo) or (cac lop)) van thanh van su triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach ty)) nang xa hoi. hieu ve ((cac lo) or (cac lop)) van thanh van su triet*.